Generate shell completions

Cargo.toml

@@ -18,5 +18,6 @@ anyhow = "1.0.81"
 [build-dependencies]
 clap = {version = "4.5.3", features = ["default", "cargo"]}
 clap_mangen = "0.2.20"
+clap_complete = "4.5.1"
 
 [features]

build.rs

@@ -3,6 +3,9 @@ use std::fs::write;
 use std::io::{ErrorKind, Result};
 use std::path::PathBuf;
 
+use clap::ValueEnum;
+use clap_complete::{generate_to, Shell};
+
 // This is a bit of a hack to not have to rewrite the cli in the build
 #[path = "src/cli.rs"]
 mod cli;
@@ -13,17 +16,22 @@ fn main() -> Result<()> {
 
     let out_dir = PathBuf::from(var_os("OUT_DIR").ok_or(ErrorKind::NotFound)?);
     println!(
-        "cargo:warning=manpages built at {:?}",
-        out_dir.join("little_boxes.1")
+        "cargo:warning=manpages/completions built at {:?}",
+        out_dir.clone()
     );
 
-    let cmd = cli::cli();
+    let mut cmd = cli::cli();
 
-    let man = clap_mangen::Man::new(cmd);
+    // Generate manpages
+    let man = clap_mangen::Man::new(cmd.clone());
     let mut buffer: Vec<u8> = Default::default();
     man.render(&mut buffer)?;
-
     write(out_dir.join("little_boxes.1"), buffer)?;
 
+    // Generate completions
+    for &shell in Shell::value_variants() {
+        generate_to(shell, &mut cmd, "little_boxes", out_dir.clone())?;
+    }
+
     Ok(())
 }

vendor/clap_complete/.cargo-checksum.json

@@ -0,0 +1 @@
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